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Luminex instrument

Manufactured by Bio-Rad
Sourced in United States

The Luminex instrument is a multiplex analytical system that utilizes flow cytometry technology to detect and quantify multiple analytes simultaneously in a single sample. It provides a platform for high-throughput, rapid analysis of various biomolecules, including proteins, nucleic acids, and cell-based assays.

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7 protocols using luminex instrument

1

HLA Genotyping of Pregnancy Cohort

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Class I and II HLA genotyping was performed for DNA prepared from infant samples collected in the pregnancy cohort. Commercial kits for HLA‐A, HLA‐B, HLA‐C, DRB1, DRB3,4,5, DQB1 and DPA/B loci (Immucor, Norcross, Georgia, USA) were used for locus‐specific PCR amplification according to manufacturer's instructions, followed by detection via allele‐specific probes using a Luminex instrument (Bioplex, Biorad) and Match‐It DNA software (Immucor). The typing was reported at the 2/4 ‐ digit resolution.
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2

Multiplex Cytokine Profiling

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Plasma contents of IL-1, IL-6, IL-4, and TNF-α were determined in duplicate by using Bio-Plex Pro cytokine assays kit (Bio-Rad, Nazareth, Belgium) and measured using a Luminex instrument (Bio-Plex; Bio-Rad) following the manufacturer’s instructions.
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3

Dnm1l and actb mRNA Quantification

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For quantification of mRNA levels of Dnm1l and actb in muscle, we used the QuantiGene Plex Magnetic Separation Assay kit (Affymetrix, Santa Clara, CA, USA) following the manufacturer’s instructions and as previously described [32 ]. The signal was detected with a Luminex instrument (Bio-Rad, Milan, Italy). For each sample, the average signal (MFI) for Dnm1l and actb were determined and, after average background signal subtraction, Dnm1l signal was normalized to the housekeeping gene signal.
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4

Quantifying Trabecular Bone mRNA Expression

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A sample of trabecular bone was taken from the distal right femur and homogenized in buffer provided by the manufacturer using a high-speed homogenizer (Bead Ruptor 24, Omni, Kennesaw, GA, USA) and steel beads at 4°C. The tissue lysate was incubated at 65°C and centrifuged to precipitate the debris.
mRNA expression was quantified using the QuantiGene Plex 2.0® technique (Panomics/Affymetrix Inc, Santa Clara, CA, USA) according to the manufacturer’s instructions. Oligonucleotide probe sets for the genes of interest were designed by the manufacturer. The tissue lysate was pipetted into a 96-well plate preloaded with capture reagent and a probe set. After incubation overnight at 54°C, hybridization with the preamplifier, amplifier, and biotinylated label was carried out. Luminescence was measured using a Luminex® instrument (Bio-Rad, Hercules, CA, USA), and the mean fluorescence intensity specific for each gene (proportional to the mRNA captured by the bead) was generated. Expression of each gene was normalized to the expression of glyceraldehyde 3-phosphate dehydrogenase. The genes of interest are listed in Table 1.
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5

Multiplex Gene and Protein Profiling

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For gene array, corneas were processed using a magnetic bead-based Quantigene 2.0 multiplex kit (Affymetrix). Briefly, samples were lysed to extract RNA and incubated with specific target probes overnight. Signals were amplified with a hybridization technique, and detected using a luminex instrument (Biorad) after adding streptavidin with phycoerythrin as a substrate. For protein array, tissues were homogenized with a Tissuemiser (Fisher Scientific) in Tissue Protein Extraction Reagent (T-PER, Fisher Scientific) in the presence of 1x Calbiochem protease inhibitor cocktail set I (Millipore). Homogenates were centrifuged in a microcentrifuge at 10,000×g for 90 sec at 4° C, and the supernatants were evaluated for analyte content by multiplex (Millipore) or ELISA (R&D) assays.
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6

Multiplex Gene and Protein Profiling

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For gene array, corneas were processed using a magnetic bead-based Quantigene 2.0 multiplex kit (Affymetrix). Briefly, samples were lysed to extract RNA and incubated with specific target probes overnight. Signals were amplified with a hybridization technique, and detected using a luminex instrument (Biorad) after adding streptavidin with phycoerythrin as a substrate. For protein array, tissues were homogenized with a Tissuemiser (Fisher Scientific) in Tissue Protein Extraction Reagent (T-PER, Fisher Scientific) in the presence of 1x Calbiochem protease inhibitor cocktail set I (Millipore). Homogenates were centrifuged in a microcentrifuge at 10,000×g for 90 sec at 4° C, and the supernatants were evaluated for analyte content by multiplex (Millipore) or ELISA (R&D) assays.
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7

Quantifying TTK mRNA in HCC samples

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The mRNA expression of TTK in HCC specimens and their adjacent non-tumourous liver tissues were quantified using QuantiGene Plex 2.0® assay (Affymetrix) following the manufacturer's instructions. All the oligo nucleotide probe sets including capture, label and blocker probes were designed by the manufacturer. For each sample, 200 μg extracted total RNA was used at the beginning of the assay. Mean fluorescence intensity (MFI) generated from each specific probe set were captured and quantified using a Luminex instrument (Bio-Rad).
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